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light was emitted from objects glowing at different temperatures; atoms can absorb and emit only certain amounts of energy |
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light of a specific frequency (energy) shines on a metal, the metal will eject electrons; a single photon of a specific quantity is needed |
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electrons can have only specific allowed energy levels; electrons can undergo transitions between energy levels |
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electrons can be diffracted just as light can; wavelength inversely related to mass and velocity |
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described the likely location of electrons in an atom |
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Uncertainty Principle - can't know both the position and motion of an electron at the same time |
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